any use for a pitted 4.38 H190 diffirental?

[Son_of_a_Nun]

I just swapped out my 4.38 H190 rear differential with my pristine donor truck's 4.38 H190. The damaged one had a howl at speed and a small piñon oil leak. In addition, i found that I must have had water in the axel and pitted the ring gear. Any idea's what to do with the damaged one? Sell, Scrap, Keep/repair?

[datzenmike]

Garbage. The howl was almost certainly pitting of the bearings and races.

[flyerdan]

That would be good to go into a trailer axle if one was making a box trailer.  They don't get the miles that a pickup does (normally), and with some moly gear additive that should quiet it right down, especially since it's not driven.

[datzenmike]

Never submerge the H-190 in water. When hot the air inside contracts when suddenly cooled and will suck water in through the vent on top.

[Stoffregen Motorsports]

13 hours ago, flyerdan said:

That would be good to go into a trailer axle if one was making a box trailer.  They don't get the miles that a pickup does (normally), and with some moly gear additive that should quiet it right down, especially since it's not driven.

I never understood why people would want a semi floating axle with gears in a trailer. Head down to Tractor Supply and buy a complete trailer axle for about $300.

[datzenmike]

Don't forget that copper wire was invented by two Datsun owners fighting over a penny in the 1700s.

[Stoffregen Motorsports]

Tru-dat

[ttyR2]

Clean it up and put it on a bookshelf...makes for a conversation-starter.

[datzenmike]

Too heavy. Remove the R&P and put them on display.

[Stoffregen Motorsports]

I guess I wonder if the gears are really pitted at all. I just resurrected a badly rusted 4.22 Sprite gearset that had been sitting in a pool of water in the trunk of a car for years. The bearings were seized up, but once I got the R&P out, I blasted them and they look totally usable.

[datzenmike]

They will rust but the high carbon content in much more resistant that regular low carbon steel.